Acronyms, Abbreviations, and Initialisms.
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The meaning of the Acronym OSA is...

OSA is

Office of the Secretary of the Army
Operational Support Airlift
Open System Architecture
Office Of Special Affairs
Operational Services Agreement

More Meanings For OSA:

Office Systems Architecture
Open System Architecture
Open Scripting Architecture
Open Standard Architecture
Open Service Access
Omnibus Service Authority
Office Of Student Activities
Observability Subspace Algorithm
Order Of St Augustine
Orissa Society Of America
One Step Ahead
Ontario Society Of Artists
Orissa Society Of Americas
The Office Of Secret Actions
Old School Arcade

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